abbott



H. W. ABBOTT. TRANSMISSION LOCK.

APPLICATION FILED 1M/31.1911.

Patented 0er. 7,1919.

2 SHEETS-SHEET I.

afn! #550w Lfrw El f mw pm raiser ramon HARRYW. `Lliisisorrr, or cnice-Feo, ILLINOIS.

- TRANSMISSION' -LOCK.

israele.

Applicatdon filed May 31, 1917-. Serial No. 171,936.

To allwhom t may concern:

Be it known that I, HARRY W. Aiao'r'r, a

, citizen. of the United States, residingat Chicago, in the countyv of Cook and State of llinois, have invented a new and usefullmproveinent in Trans mission-Locks,- of which i the following is a speciiicatioii.

This invention relatesy particularly to locking d j l object isto provide means `for locking the transmission, which is` simple in construction lari-'d thoroughly eHfective for its purpose; f

The invention is illustratedjin its preferred" embodiment in thev accompanying drawings, in which Figure 1 represents a broken vertical Sectional view ofthe gear-casing of an automobile and the gear-shifting mechanism,' equipped with the improved locking device; f'fj'Fig. 2 represents a bottom plan view. of the ffremovable top ofthe gear-casing, vupon which the gear-shifting lever is mounted,

and which isV equipped also' with the iinproved locking device; Fig. 3, a broken vertical sectional view showing the connection between the locking disk employed and the key-controlled'spindle which serves to actuate said locking disk; Fig.l 3, a plan view 'of the lock employed; `Fig. 4, a transverse vertical sectional view taken as indicated at line 4 of Fig. l; Fig. 5,`a horizontal sectional view takenv as indicated at line 5` of Y se.

Fig.v l and showing the gear-shifting rods, or members vof the gear-shifting couple,

.locked in neutral'position; Aand kFig-6, a `similar view showing the gear-shifting rods unlocked and one ofv the rods shifted to a dierent position. y

Lln the embodiment illustrated, A represents the gear-box of an lordinary sliding gear transmission of an. automobile; A', the removable cover-plate of the gear-box; B, I a geareshifting leve'r mounted on theV cover- .plate A. in a universal bearing B of wellvknown construction; C, C, a pair of .gear-- shitting rods, or the members of a gearshifting couple, recip'iocably mounted in the cover-plate, said rodsV equipped,- .respectively, -with'y depending `gear-shifting ar'eqadapted to enga-ge the annular grooves wit I the lsliding-gears are commonly provided;

D, the improved 'locking means with.y which Specication oflLetters IE'atent. I

. `of the Hoor-boards devices adapted toprevent the theft` of automobiles or the like; andthe primary with the socket, or recess, 1,

li which lthe hubs of .4

rateiieeu oet. t, isis..

the cover-plate A is equippedg'and E, one

through which the gear-shifting lever B and its mounting extend.

In the illustration given, the gear-box is that of 'a type of transmission where the gear-casing is located 'beneath the foot-board in front of'the operators seat and imme-l diately back of the fly-wheel of the engine.

The members C, C', couple are in the form of rods, or bars, whichl arel capable of .being reciprocated rearwardly and forwardly in longitudinal y guides with which the cover-plate A is provided. lThe gear-shifting yokes C2 and C3 are rigidly .attached to therods C and C, and are provided with recesses l. adapted to be engaged by the lower end 2 of the gearshifting lever B. The mounting B for the gear-shifting lever is i'ii the form of a holv low boss which rises lfrom the cover-plate,

and in which the lever is mounted in .a universal bearing. The lever is held in neutral position by leaf-springs 3 which bear against the sides of thelower portion of the lever, in the usual manner. Projecting into the' chamber in which the lower portion of the` lever works are longitudinal tongues 4 which divide the chamber into longitudinal channels and 6, which are ,connected by a cross-slot 7 disposed between of the gear-shifting of the automobile-body,

on its outer side with an intermediate notch 8, and with additional notches Sa and 8b. The plate A is fitted with spring-hel d pawls 9 adapted to engage said notches/l 'Phe plate A is Jfurther equipped with a double-acting pawl l0, which is dispo-sed between the rods C and C and ada ted to engage notches 10a,

with which therods are provided at their innersides at points `corresponding with the" neutral positionof the rods. In Fig. 5, the pawls 9 yieldingly lock the slide-'rods C and C. in the neutral position, in which position g thel rods are so situated'as-to 'be l "capable of u being interlockingly engaged by a key-'con-v trolled locking member, with which the lock. ing device D is provided. Fig. shows the rods locked by the membenjust referred to.

The pawls 9 and 10 are the devices commonly i employed 1for yieldingly .locking the gearshifting rods in selected positions. The

' pawl 10 servesto lock eitherl oneV ofthe rods agalnst actuation when the other rod is shifted. .Thisis well'understood.

The locking device' D, in the construction shown, comprises a vertical `chamber 1 1 formed in a bos's cast integrally with the' plate Ai and disposed in the rear of the" lever-mounting B; a'lock'in'g disk'12 journaled in the lower portion of, said chamber-- lac la-pted to interlockingly' engagethe gear. shifting rods C andC; a lock-casing 13 permanently secured in the'chamber 11 above the disk 12; and-a key-controlled actuating spindle 14 extending through the casing .13'

' and connected with and serving to -actuatei the disk 12.

The disk 12, which is confined so 'as to be nonwithdrawable axially is provided at its lower side with -a short journal 128- which is received'in a bearing provided in the' bottom of .the chamber 11'; and the uppersideof the l l1which the interposed disk l2 engages when disk is providedv with a'tenon 12b which lits the members C andCf are in the neutral p'osition and the member-.12 is so turned as toV away, or provided' at opposite sides with plane faces 12, so that the disk willclear or be free from engagement with the rods when the disk is in the position shown inFig. 6. The bottoni of the chamber 11 is shown provided (Figs. 1 and 6) v` with a spring-held locking pawl, or ball, 17, which is adapted to 'engage recesses 17L and 17"', which corre-v spond with the lockingand non-locking positions, respectively, of the disk 12. When the pawl 17 en ages lthe recess 1'? b, the disk 12 is yieldingly eld in the non-locking position, thus .permittin freedom of movement of the rods C and in the gear-shifting opera'-l tions. The recess 1"(a is unnecessary, but

may be. employed if desired. .This recess corresponds with the locking position of the disk12, but it-is to be observed that when the disk 12 is in the locking position, the

spindle 14 which is rigidly attachedthereto. lis secured against rotation in the lock-cas-` ing 13 the usual tumblers employed in a lock of the p'in type, one of such tumblers` being indicated, at 18 in Fig. 1. The lock-casing 131s shown secured inthe lock-casing.l y

serves as a key-controlled actuatlng member,

@meer libs; ground off flusliwith theouter wall of the which form-s'the chamber 11, as 'shown In Fig.v 4.`- Any other Inezms'ofperma the, 4lark-'(5aSing; in position nently securi means of .screws '19 which are may. be adopted.'- The lock-casing-is aisd'f providedwith'the usual-vertical boss' 20, in

.In lfig. 1, the floor-board Eis shown provided with 4a perforation through which the boss B projects, and this opening is extend- '75. 1s. inserted, thus en? edito. provide a passage l22'which gives acto the board E. A key 24 of the'` Yale type lcess 4tothe lock. The passage 22 Vmay beA closed by means of a hinged plate 23 applied may be employedfor unlocking the spindle 12 may be rotated to a non-locking position,

and the key may be allowed to remainin the lock beneath'the closure 23. When it is deal 14-.and rotatin'g'it. -Byfthis'means the diskl sired to lock the machine, the spindle may .b'e rotated through theV medium of the key to throw the disk 412to the locking position shown `iI1"'F i, 5,' after. .which the key may be removed, and thespindle will be locked to the lockcasing 13 ,by means of the paw'l rt win be noted fromrig. .5 that elegidas f 12c ofthe disk project somewhat beyond the toshift onef of said rods .by means of the hand-lever B, the effect willl be to .cause a engage there'wlth. The member 12 1s cut binding between thedisk' 1 2 and the gearshifting rods". The significance of this-is' that the strain exerted through the medium reo' recesses 16, with which the rods C-and C are provided, .consequently if 'an effort is made' of the lever B is takencare of at thedisk 12,

Vadapted. to its purpose, and maybe provided at moderate cost.4 Its use isl preferably pro-V Y vided forinthe manufacture of a machine by casting the chamberll integral with the cover-plate A and recessing the rods-C and I v C to accommodate the locking disk. Preferably the spindle 14 is actuated directly by thfe key which serves to release it from the- In any event, thel member' through the mediufn of which the locking v disk l2 is turned to lock or release the'gearshifting members C and C.

The foregoingl detailed description has been given for clearness of understanding` only, and yno unnecessary limitation shouldV -L so` that no undue strain will be placed upon l thetumblers 18 of the flock, and the lock will not be injured.` It is' preferred to case- `cure by e 'i 'l be understood herefiom, butthe appended claims shouldgbe strli'ed asbroadly as peif missible inNie .the prior art.

as "new, and desire, to; Sie;- atent, is: ,l V

1. In .afde'v1ce'ofthe characterset forth,

A '7, vtion of a pair of reciprocablymounted 'a'rallel gear-shifting rods provided on adjacent sides with segmental 4re-l cesses, an4 interposed axially non-withdrawable rotary locking disk having two sides cut away,` said disk being; adapted, whenturned to one position, to directly engage said recesses, and, when turned to another position, to clear saidrods, and key-controlled means for turnin'g'said disk,

- '2. rlphe combination with a gear casing plate, a pair ofparallel gear-shifting rods mounted there-in, and an actuating lever for 'said rods mounted on said plate, said plate being provided with a vertical chamber having a bottom disposed in the plane of said rods, of an axially non-withdrawa'ble rotary locking member jonrnaledin the bottom of 'said chamber, said locking member being' -'adapted, when turned to one position, to

I, directly engage and lock -said rods, and, when 'turned to another position, to clear .'s'aidfrods, a spindle adapted to.rotate.-

3. In an apparatus of the kind described,

two reciprocating rods. adapted to throw themechanism into and out of engagement, said rods being provided with adjacent cavities,

a part adaptedto rotate in a bearing about an axis midway between said -rods and extending-.at right angles to a plane through the axes of said rods and. so formed that when turned in,v one position it shall enter .I i

both of said cavities and when turned in another position shall be withdrawn therefrom, and means for lockingsaid part in its engaged position.

4. Ina device of the character set forth, A.

the combination of a pair of reciprocablymounted parallel gear-shifting rods provided on adjacent sides with lsegmental recesses, an interposed lockingvdisk havinpgtwo sides cut away, an actuating spindle for said disk, means for locking said spindle against rotation, anda key adapted torelease said spindle and effect rotation thereof. v HARRY W,- ABBOTT. 

